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(No Model I. U. HIMMER & W. P. WEISGERBER.

SECONDARY ELECTRIC OLOGK.

No. 298,205. Patented May 6, 1884.

ATTORNEYS N. PETERS, Fhnwhlhognpbon Walh'lngiun, D. c

NITED STATES PATENT OFFICE.

IDA O. HIMMER AND WILLIAM F. WEISGERBER, OF NEW YORK, N. Y.,

ASSIGNORS TO SAID IDA O. HIMMER.

SECONDARY ELECTRIC CLOCK.

SPECIFICATION forming part of Letters Patent No. 298,205, dated May 6, 1884-.

Application filed January 31, 1884. (N model.)

' WILLIAM F. WEISGERBER, citizens of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Electric Clocks, of which the following is a specification.

The object of this invention is to simplify and cheapen the mechanism of an electric clock, and at the same time insure a correct action. The peculiar and novel construction of our electric clock is pointed out in the following specification, and illustrated in the accompanying drawings, in which- Figure 1 represents a sectional rear view showing the parts imposition when the electro-magnet is not vitalized. Fig. 2 is a similar View showing the parts in position when the electro-magnet is vitalized. Fig. 3 is a sectional side View looking in the direction of arrow 1, Fig. 1. Fig. 4 is a sectional side View looking in the direction of arrow 2, Fig. 1. Fig. 5 is a section in the plane or m, Fig. 1., on a larger scale than the previous figures.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates a frame, which forms the bearings for the arbor B, which carries the second or minute hand of a time-piece. On this arbor is mounted a wheel, 0, which has sixty teeth, so that whenever this wheel is turned one tooth the hand is turned forward for one minute or for one second. The rear end of the arbor B projects beyond its bearing, and on this projecting end is placed a split washer, a, which is held in position simply by friction, and the object of which is to prevent the pinion I), which is mounted 011 the arbor B, from coming in contact with the inner surface of the frame A,

- whereby the freedom of motion of said arbor the desired relation toward said cores. This adjustment is of importance, since the amount of electrical power required for operating the rect adjustment of the armature. The pin 0 passes freely through the lug f of the armature; but the lug f is provided with an internal screw-thread,which engages quite loosely with a corresponding thread on the outer end of the pin 0, so that it permits the armature to oscillate freely, while at the same time sufficient resistance is produced by said screwthreads to retain the armature on the pin. This connection is not only very cheap, but it also enables us to bring the upper end of the armature quite close to the head of the electro-magnet, which could not be done if a nut were used to retain the armature on the pin 0. At the same time, by turning the armature round, it can be moved toward or from the arm d, so that its center can be brought opposite to the center of the cores.

On the armature is fastened an arm, F, from which projects a pin, 9, through a slot, h, formed in a lever, i, which is firmly mounted on a rock-shaft, j, mounted in the frame A. The arm F is adjustable by means of a screw, j, which passes through a slot, 76, and also by means of a screw, Z, which is tapped into said arm, and the tip of which is brought to bear upon the face of the armature. By means of I the screw 9" and slot kthe arm can be moved up or down, so as to decrease or increase the movement of the pin g, which governs the amount of motion transmitted to the rockshaft 9'. By means of the screw Z the arm F can be adjusted toward or from the rock-shaft j, the object of which adjustment will be presently explained.

On the rock-shaft are firmly mounted a le ver, G, and a pawl, m, said pawl being in such a position that it clears the teeth of the wheel Gwhen the armature E is not attracted; but when the armature is attracted said pawl engages the wheel 0. On the lever G, near its free end, is fastened a lug, a, which carries the gravitating pawl H. The lug a is secured to the lever by a screw, 0, so that it can be swung in or out in order to adjust the pawl H in relation to the wheel O. Said pawl swings loosely on a pin, p, secured in the lug n, and it is provided with a propelling-finger, q, and

clock depends in a great measure upon a cora stop'finger, 1 the propellingfinger being the heavier of the two. By the weight of the lever G and of the pawl H the armature is thrown back when the electro-magnet is not vitalized, and in this position the stop-finger r engages with one of the teeth of the wheel 0, preventing the same from moving forward, while the propelling-finger q rests upon the circumference of said wheel. (See Fi 1.) A stoppawl, s, which is mounted loosely on the rockshaft 3', prevents the wheel 0 i rom moving backward, and consequently by the combined action of the stop-finger r and stop-pawl s the arbor of the minute-hand is firmly retained in position. Then the electro-magnet is vitalized, its armature is attracted until the outer end of the lever G strikes a pin, f, thus preventing the armature from coming in close contact with the cores of the electro-magnet.

At the same time the pawl 11 is raised to the position shown in Fig. 2 and the pawl m is thrown in gear with the wheel C. \Vhen the circuit through the electro-magnet is broken, the lever G falls down to the position shown in Fig. 1, the armature is thrown back, carrying the pawl m out of gear with the wheel 0, the finger q of the pawl H engages with the teeth of the wheel 0 and propels the same one tooth, and the finger 2' stops the forward motion of said wheel. In order to obtain a correct action of the pawl m, lever G, and pawl H, the arm F must be correctly adjusted by means of the set-screws Z and j.

It will be seen from this description that the normal position of the armature is governed by the lever G and step '6, while said lever and the gravitating pawl I-I cause the wheel 0 to move forward. In the example shown in the drawings the wheel 0 is mounted on the center arbor carrying the minute or second hand; but it may, if desired, be mounted on an arbor which is geared together with said center arbor.

It must be also remarked that the stop '6 can be applied directly to the armature or to the arm F, secured to said armature.

Thepawl H is fastened to the lug a by the screw 1), on which it swings freely. By turning the screw the pawl can be set in or out, so that it comes in the correct relation toward the cogs of the wheel 0.

\V hat we claim as new, and desire to secure by Letters Patent, is

1. The combination, substantially as hereinbefore described, of a cog-wheel, C, an electromagnet, D, a pivoted armature, E, a lever, F, connected with the armature, a pivoted lever, G, and a gravitating pawl, H, pivoted to one end of the pivoted lever, and provided with a stop -finger, 1', and propelling-finger q, said pivoted lever, by its gravity and that of the pawl, serving to retract the armature, and the propelling and stop fingers being thrown into engagement with the cog-wheel by the gravity of the propelling-finger, all substantially as set forth.

2. The combination, substantially as hereinbefore described, of the electro-magnet, the armature, the cog-wheel mounted on or geared together with the center arbor of a clock, the rock-shaftj, the slotted lever mounted on said rock-shaft, the arm extending from the armature and engaging with the slotted lever, the pawl m, and the lever G, mounted on the rockshaft, and the propelling-pawl attached to the lever G.

The combination, substantially as hereinbefore described, ofthe'electro-magnet, the armature, the cog-wheel mounted on or geared together with the center arbor of a clock, the lever G, which is connected with the armature, so as to be actuated by the same, and which serves to retract the armature, the lug a, adjustably secured to the lever G, and the gravitating pawl H, pivoted to this lug, and provided with a propelling-iii'iger and with a stopfinger, which are thrown in gear with the cogwhecl by the gravity of the propelling-finger.

4. The combination, substantially as hereinbefore described, of the electroinagnet, the armature, the cog-wheel mounted on or geared together with the center arbor of a clock, the rock-shaft j, the arm extending from the armature and geared together with the rockshaft, the screws j and I, for adjusting the position of said arm, the pawl m, and lever G, mounted on the rock-shaft, and the propelling pawl attached to the lever G.

5. The combination, substantially as here inbefore described, ol' the clcctro-magnet, the armature, the adj listing-screw on which the armature swings, the adjustable arm (I, the levers F and G, and the gravitating pawl for propelling the wheel, mounted upon or geared together with the center arbor of a clock.

6. The combination, substantially as here inbefore described, of the electro-magnet, the armature, the pawl m, the stop-pawl s, loosely mounted on the rock-shaft, the gravitating pawl 11, the adjusting-screw on which said pawl is mounted, and the wheel mounted on the center arbor of a clock.

7. The combination, substantially as described, of the electro-magnet, the armature mounted on the adjustingscrew c, the adjustable arm d, the arm F, extending from said armature, the lever G, the pawl 11, and the wheel 0, mounted on the arbor 13.

In testimony whereof we have hereunto set our hands and seals in the presence of two subscribing witnesses.

1m 0. nnnma. [r.. s] WILLIAM I". WEISGER lllli. [Th W'itnesses: I

WILLIAM MILLER, E. F. KAs'rnNIIUnnn. 

